Thanks for the feedback, any issues with the Head Studs that I should know about. Im not looking to get into that job any time soon.

 

Just spoke with Dale Isley from Tymar and he also said to leave the stock filter intack in the 6.0's. There is nothing that cleans or flows better. He did suggest the DP and exhaust mods as well as an EGR delete. Thanks for the info on the tunes. Looks like using my buddies SCT is not going to work. I jetisoned the EDGE module I had as the entire truck was in the water over the hood and I have no faith that it will work properly. In the market again I guess.

 

DP as in DP tuner? If so, they make good tuners for the 7.3, but there are better people that tune for the 6.0 and have been doing so longer then he has specifically with regard to the 6.0.

As to the EGR delete, that really isn't needed as much as people like to think it is. It might require a little more effort on your part and drive the truck a little differently since it has an EGR system, but the EGR system in of itself isn't an unreliable system.

 

Sorry, DP = downpipe

 

Have any of you dyno tested an intake system?, Ihear this same claim repeated often, but when I tested the Airaid intake, gibson exhaust(cat back), and Dr performance chips on a new 04 6.0 in early 04 for an article published in offroad magazine, the Airaid intake delivered their claimed HP(about 30), while the cat back did not, and actually hurt the low end response. I am not saying that you must have an intake, but they do provide some gain. the turbo failures come from K+N filters(2 layer cotton) or leaks. I have 160k miles between 2 6.0s with many dusty offroad miles (Arizona), and no turbo failures(2 head gasket jobs, 4 oil coolers, 3 EGR coolers, 1 ficm). The Airaid showed no gain when tested with the optional mesh prefilter, but no loss. I have also tested 3 dr performance modules, 1 hypertech piggyback 3 position computer, 1 Quadzilla, 1 hypertech tuner. some did show mileage gains over a mixed driving loup. My current hypertech max energy, MBRP 4" turbo back, Airaid intake, Accufab elbow, EGR plug and throttle butterfly delete. Runs, shifts and drives well, and easily gets 20mpg highway@75 if the wind is not excessive(hand figured, cc4x4sb on 285x75x16 muds) best tank 28 mpg@60mph on oem 265 tires on flatland. stock was a best of 22@60, usually17@75.

 

I can't speak for everyone, but I have spent many hours at the dyno.

It's not exactly that they don't flow more in or itself, it's when they flow more. Some don't flow more until you hit 3700 on the tach. What good is that when a stock or tuned 6.0 peaks out at 3300/2000 for HP/TQ respectively. If you are hitting 3700 rpm on the tach regularly on a street truck with stock parts with or without tuning, you are asking for problems to see the benefit of that intake.

Plus, you have to factor in the variables that apply for when you do the dyno(type, programming, settings of the dyno etc). Also did you test all those at once or one at a time? Even the operator comes into play as a variable when it comes to the dyno.

Did you do the testing on different strategies? Did you even note the strategy that was used? Some are known more for power then others with the 6.0.

When and where was the testing done?

A lot of variables that can produce different results, although ~30HP on intake alone I do find hard to believe unless you run a strategy that had more power in it from the get go(which a couple of the early ones did have).

 

The test was on stock tuning, we did not test it with the modules, I just went to look for the dyno sheet, but could not find it(it was 7 years ago), the Airaid delivered it's claimed hp and torque. I believe that more current tuners may lessen the power gain by delivering more boost. More boost means more air. We tested 3 dr performance modules that day, and the Gibson cat back system. The 115 hp dr performance module could not get usable dyno #s due to (suprise suprise) transmission shifting issues. But the truck 04 cc 4x4 shortbed turned 14.5@98 mph at Firebird raceway the week before with only the chip, stock exhaust, stock intake, 4"lift, 235/85/16s. 7500lb race weight.

 

ps. the other products I tested over the following year or so as they became available by driving them before we sold them, I managed a retail 4x4 store at the time. I tested the quadzilla and the Max energy 2 years ago looking for a mpg combo for myself. The main thing about SCTs( I have not tested them), is that they are only as good as whatever tunes are loaded on them. Good tunes=good results. The max energy is not even as fast as the old DR Performance module was(seat of the pants, no data), but it drives well and gives me good MPG on stage 3. I would love a 50hp tune if it would match my mpgs(lots of rain and snow where I live now). The stage 1 hypertech, and stage 1 Quadzilla got poorer mileage on my loup. I believe that hotter tunes give better mpgs due to less down shifting and more timing. oem tunes limit timing to control nox emissions; less cylinder pressure=less nox. Urea injection controls nox allowing more timing and better mpgs on the new 6.7.

 

But when? That's the biggest question. If it was at 3700 rpms, so what. I'm pushing 508 HP and I hardly ever see that much rpm towing or just on the street. Now racing that may be a different story, but for 95% of the population that owns these trucks, they aren't going to see that extra until they are way way way up there in rpms.

Once again, I just want to make sure that everyone understands that I'm not saying that they don't flow more, but my problem is when do they flow more. Whem it flows more makes a big difference especially when considering the application(street truck v. race truck etc) that it is going to be used in.

30HP is also an awful lot for just an intake without any other little tweaks here and there, unless it's make it up in the back end(higher rpm range compared to stock at the same rpm range) which is where I'm suspecting that it's happening

However, this exchange is moot without the actual sheet.

 

none of those things will happen on a stock tune, most air intakes provide the most gain lower in the rpm range(under the curve) before the turbo can make maximum boost, where the engine is relying on atmospheric pressure to feed the motor. Most aftermarket manufacturers claim "peak improvement", ie lay the 2 dyno sheets over each other and look for the point where they see the biggest difference, almost never at peak hp. the stock tunewill not allow much improvement in high rpm power, Airaid does not have the6.0 dyno chart on their website anymore, but on an 03-07 5.9 Cummins their intake gained 23hp/32ftlb betweenabout 1700-2200 rpm, but no gain at peak hp, those are towing rpms. Gas motors show max gains at high rpms because they do not have turbos. I was there and the test was performed on my truck by personel from DrPerformance(not Airaid). the benefits were quicker low rpm response(again on factory tune). The article apeared in Off Road magazine in 04. These aftermarket intakes would not help in a dyno competition because the gains that they provide do not come at the hp peak, but anything that helps lower rpm power and turbo spooling on a stock/mild tune would be beneficial when towing.

 

The one dyno that K&N had of the 6.0 that was on their website(now it's just the 7.3) showed improvement at 3700 RPM, nothing lower. I've had my *** in the dyno chair looking at the computer for far to long to see that there is any improvement were it will matter for the 6.0 and the general owner.

Plus the other issues that happen with the oil based filters as well(over oiling, owner induced issue, but still an issue).

There are negligible gains versus what issues could arise.

I might also add that with a little over 500HP, I'm still using the stock intake as are quite a few people that are at my HP level or even some over that. At the price range that it takes to get that out of a 6.0, there has got to be some reason why us crazy people don't go with the a/m intake.

 

So, anyone with a cold air intake wanna sell me their stock one?

 

i have an sct tuner with custom tunes from matt at gearhead the best tunes ever. i had tunes from jody at dp-tuner the economy,and tow. matts tunes are by far the best.

 

how do you get custom tunes? I have a SCT X4.